*  1  -.Aw 

GENFIRE  STEEL  COMPANY 

YOUNGSTOWN,  OHIO 


A  COMBINED  FORM 
and  REINFORCEMENT 
for  FLOORS  and  ROOFS 


w  THE  IDEAL 
REINFORCEMENT  for 
SOLID  PARTITIONS 
and  CURTAIN  WALLS 


THE  FIREPROOF  PRODUCTS  CO.,  Inc. 
536-548  EAST  133rd  STREET, 

NEW  YORK 


A  COMBINED  FORM  and  REINFORCEMENT 
FOR  FLOORS  and  ROOFS 


Trussit 

The  IDEAL  REINFORCEMENT  for 
SOLID  PARTITIONS  and  CURTAIN  WALLS 

THE  FIREPROOF  PRODUCTS  CO.,  Inc. 

536-548  EAST  133rd  STREET, 

NEW  YORK 

GENFIRE  STEEL  COMPANY 

YOUNGSTOWN  ,  OHIO 

Manufacturers  of  a  Complete  Line  of  Firesafe  Building  Products, 

Also  Waterproofings  and  Concrete  Preservatives 

Copyright  1928  by  Genfire  Steel  Company  A-592-1  Printed  in  U.  S.  A.  5M  12-28 


AVERY  LIDPARY 
£QU»  .UTILITY 


GEN  FI  EE  '  STEEL  '  COMPANY 


Table  of  Contents 


SELF-SENTERING 

Page 

Description .  3 

Self-Sentering  Shears .  4 

Self-Sentering  Punch .  4 

Self-Sentering  Data .  5 

Data  Regarding  Loads .  5 

Self-Sentering  Roofs .  7 

Details  of  Roofs . 8-9 

Erecting  Temporary  Supports . 10 

Self-Sentering  Floors  ....  ....  11 

Roof  and  Floor  Specifications .  13 

Self-Sentering  Ceilings . 14-15 

Curved  Self-Sentering .  16 

Self-Sentering  and  Trussit  for  Small  Buildings  .  17 

Steps,  Stairs  and  Risers .  18 

Self-Sentering  for  Walls  and  Partitions . 19 

Self-Sentering  on  Wood  Frame  Buildings  ....  20 

Miscellaneous  Uses . 21 


TRUSSIT 


Description .  23 

Trussit  Data . 24 

Solid  Partitions .  24 

Curtain  Walls . 25 

Details  of  Partitions  and  Walls . 26-27 

Solid  Partition  Specifications . 28 

Curtain  Wall  Specifications .  29 

Solid  Exterior  Walls . 30 

Trussit  and  Self-Sentering  for  Fences  andjRailings  .  .  31 


S E L F -SEN T E E INGS  T E USSI T 


Self-Sentering 

A  Combined  Form,  Lath  and  Reinforcement  for 
Concrete  Walls,  Floors,  Roofs  and 
Miscellaneous  Fireproofing 


Self-Sentering — Patented  March  3,  1914 


SELF-SENTERING  is  a  ribbed  expanded  metal 
for  concrete  reinforcing  and  miscellaneous  fire- 
safe  construction.  It  serves  as  both  form  and 
reinforcement  for  concrete  floor  work  and  as  a  com¬ 
bined  steel  lath  and  studding  for  walls  and  partitions. 

Self-Sentering  is  made  up  of  a  series  of  heavy,  cold- 
drawn  ribs  11 -16-inch  high,  spaced  3%  inches  center 
to  center,  connected  by  the  most  efficient  form  of 
expanded  metal  —  the  diamond  mesh  —  all  cut  and 
drawn  from  one  sheet  of  steel. 

An  analytical  study  of  a  sheet  of  Self-Sentering 
shows  it  to  possess  advantages  not  found  in  any  other 
style  of  reinforcement.  Its  heavy  ribs  are  cold 
drawn,  not  stamped,  a  process  that  materially  in¬ 
creases  their  tensile  strength.  They  are  made 
V-shaped,  giving  maximum  rigidity,  and  with  a 
beaded  edge  for  greater  strength  where  they  join  the 
expanded  metal  fabric. 

The  connecting  fabric  is  designed  on  the  only  true 
principle  of  expanded  metal  reinforcement.  The 
diamond  shaped  mesh  diffuses  the  stresses  from  con¬ 
centrated  loads,  affords  effective  continuity  of  the 


reinforcement  and  assures  that  every  ounce  of  the 
metal  is  effective  to  resist  tensile  stresses. 

The  diamond  mesh  affords  an  excellent  mechanical 
bond  for  the  concrete,  giving  a  bonding  surface  fully 
eleven  times  as  great  as  the  same  effective  sectional 
area  in  reinforcing  bars.  This  style  of  mesh  also 
affords  a  perfect  key  for  plaster  or  mortar. 

Side  laps  on  Self-Sentering  may  be  secured  by 
clinching  with  the  special  punch  described  on  page  4, 
thus  eliminating  lap  wiring. 

Sheets  of  Self-Sentering  are  29  inches  wide  —  the 
widest  of  any  material  made  for  a  similar  purpose. 
This  means  that  the  cost  of  placing  Self-Sentering  is 
reduced  to  a  minimum.  Every  time  a  12  foot  sheet 
is  applied  29  square  feet  of  surface  is  covered.  The 
number  of  laps  is  correspondingly  decreased,  with 
additional  saving  in  labor. 

While  absolutely  rigid  the  long  way  of  the  ribs, 
Self-Sentering  is  uniformly  pliable  across  the  sheet. 
It  can  be  bent  and  twisted  or  folded  and  returned  to 
its  original  form  without  sign  of  fracture.  This  char- 


acteristic  makes  it  applicable  to  curved  work  where 
it  is  necessary  for  ribs  to  run  at  right  angles  to  the  line 
of  the  curve,  as  there  is  no  danger  of  breaking.  It 
also  enables  a  number  of  sheets  of  Self-Sentering  to  be 
assembled  together  on  the  ground,  rolled  up  and 
hoisted  to  the  level  where  it  is  to  be  used  and  there 
unrolled. 

Self-Sentering  is  always  furnished  with  a  coating 
of  baked-on  enamel  to  protect  it  before  and  after  it  is 
placed  on  the  job.  This  protective  coating  in  no  way 
weakens  the  bond  between  steel  and  concrete  as  the 
mesh  work  of  Self-Sentering  gives  a  mechanical  bond 
greatly  in  excess  of  that  actually  needed. 

Self-Sentering  finds  its  application  in  all  classes  of 
buildings;  for  concrete  roofs,  floors,  side  walls,  ceilings, 


Self-Sentering  is  pliable  and  can  be  formed  to  any 
shape  without  danger  of  breaking 

partitions,  columns  and  beam  protection — in  indus¬ 
trial  buildings,  office  buildings,  warehouses,  silos, 
tanks,  garages — such  a  multitude  of  uses  that  it  can 
be  classed  as  a  standard  fire-resistive  reinforcement. 


Accessories  for  Field  Use 


Only  two  pieces  of  equipment  are  necessary  to  re¬ 
duce  the  application  of  Self-Sentering  to  the  minimum 
amount  of  work  .  .  .  the  Self-Sentering  Punch  and 

the  Self-Sentering  Shears.  The 
time  saved  through  the  use  of 
these  tools  quickly  pays  for  their 
cost. 

Self-Sentering  Punch 

This  punch  is  used  to  elimi¬ 
nate  wiring  at  the  laps  of  Self- 
Sentering  Sheets.  By  its  use  the 
interlocking  ribs  are  securely 
clinched,  making  further  tying 
unnecessary.  Punching  is  very 
rapid  and  leaves  absolutely  no 
play  in  the  joints  and 
no  opportunity  for 
sheets  to  sag  or  bulge. 


Self-Sentering  Shears  in  use 


Showing  laps  and  method  of  fastening  by  punching 


Punches  are  well  made  of  the  best  of  materials  to 
stand  up  under  this  work.  Shipping  weight,  nine 
pounds.  Punches  are  returnable  at  invoice  price 
when  job  is  completed. 


Self-Sentering  Shears 


Self-Sentering  Shears  can  be  furnished  at  a  reason¬ 
able  cost  and  are  recommended  as  a  profitable  in¬ 
vestment  on  work  of  any  size.  Their  use  enables 
the  contractor  to  order  stock  size  sheets  and  cut 
them  in  the  field  to  suit  his  needs.  Shears  are  fur- 
nished  complete  ready  to  attach  to  a  wood  base  and 
are  readily  transported  from  one  job  to  another.  The 
blade  is  made  of  high  quality  tool  steel  and  is  re¬ 
movable  to  facilitate  sharpening.  The  arm,  exclusive 
of  the  blade,  measures  five  feet  in  length,  giving 
powerful  leverage. 


Page  Fo u r 


Self-Sentering  Data 


Self-Sentering  is  made  in  the  standard  width  of  29 
inches  and  in  lengths  of  8,  10  and  12  feet.  Longer 
lengths  up  to  14  feet  can  be  supplied  on  special  order. 
Intermediate  lengths  may  be  obtained  from  stock, 
these  being  cut  from  the  next  longer  sheet  and  the 
waste  charged  to  the  customer. 

Height  of  ribs,  11-16  inch. 

Spacing  of  ribs,  always  3%  inches,  center  to  center. 

Always  furnished  painted,  unless  galvanized  on 
special  order — no  unpainted  or  ungalvanized  material 
is  supplied. 

Armco  Iron  Self-Sentering  furnished  on  special 
order  only. 


Self-Sentering  is  made  in  the  following  weights: 


Painted  Weight  Per  Sq.  Ft. 

Effective  Sectional  Area 

Per  Ft.  of  Width 

.56  lbs. 

.167  sq.  in. 

.65  lbs. 

.193  sq.  in. 

.75  lbs. 

.223  sq.  in. 

Galvanized  or  Armco  Self-Sentering  on  mill  shipment,  minimum  of  five  tons 
one  weight  and  length. 


The  Expanded  Metal  Angle  here  shown,  is  the 
simplest  and  most  efficient  means  of  attaching  Self- 
Sentering  and  Trussit  to  floor  and  ceiling.  These 
angles  are  stapled  every  18  inches  or  20  inches  on 
floor  and  ceiling,  along  the  line  of  the  partition  and 
the  material  is  wired  securely  to  the  perpendicular 
leg  of  the  angle. 

These  angles  are  thoroughly  bedded  in  the  plaster 
and  become  an  integral  part  of  the  wall,  making  the 
attachment  permanent  and  secure.  This  method  of 
fastening  Self-Sentering  and  Trussit  partitions  to 
ceilings  and  floors,  eliminates  cracks  at  these  points, 
preventing  transmission  of  sound  and  gives  sanitary 
construction . 


Data  Regarding  Loads 


For  ordinary  spans,  Self-Sentering  does  not  require  centering, 
but  to  insure  best  results  the  spans  shown  in  table  following 
should  not  be  exceeded  without  using  temporary  supports  until 
concrete  has  set.  These  spans  are  center  to  center  of  supports. 


Wt.  Per 

Slab  Thickness 

Sq.  Ft. 

2  in. 

2A  in. 

3  in. 

3^2  in. 

.56 

3'  3" 

3'  0" 

2'  9" 

2'  6" 

.65 

3'  6" 

3'  3" 

3'  0" 

2'  9" 

.75 

4'  0" 

3'  8" 

3'  4" 

3'  0" 

Round  rods  should  always  be  placed  over  the  top  of  and  at  right  angles  to 
the  heavy  ribs  to  take  care  of  temperature  stresses.  These  should  be  about 
M -inch  diameter  or  No.  5  wire,  spaced  18  or  24  inches  on  centers  and  run 
at  right  angles  to  the  ribs. 

Safe  Uniformly  Distributed  Superimposed  Loads  per 
Square  Foot  on  Self-Sentering  Slabs 

Stress  in  steel  —  16,000  pounds  per  square  inch. 

Ratio  between  the  moduli  of  elasticity  —  n=15. 

Center  of  gravity  — .19  of  an  inch  above  bottom  of  slab. 

WL 

Bending  Moment - 

10 


Safe  Superimposed  Loads  per  Sq.  Ft.  for  Self-Sentering  Slabs 

(Weight  of  slab  and  Plaster  on  underside  deducted) 


Thickness 
of  Slabs 
above  mesh 

Wt.  s.  s. 

per  Sq. 

Foot 

Max.  Stress 
in  Concrete 
Lbs.  Per 

Sq. In. 

Moment 
of  re¬ 
sistance 

Per  Ft. 
of  Width 

Span  in  Feet 

3 

4 

5 

6 

7 

8 

9 

10 

11 

.56  lb. 

700 

4557 

392 

207 

122 

75 

48 

29 

2" 

.65  lb. 

700 

4774 

412 

219 

129 

80 

51 

32 

.75  lb. 

700 

4984 

431 

229 

136 

85 

55 

35 

.56  lb. 

630 

6144 

532 

283 

168 

106 

68 

44 

27 

2'A" 

.65  lb. 

690 

7052 

332 

199 

127 

84 

56 

37 

.75  lb. 

700 

7525 

356 

215 

138 

92 

62 

41 

.56  lb. 

560 

7551 

352 

210 

133 

86 

56 

36 

3" 

.65  lb. 

610 

8657 

408 

247 

158 

106 

71 

46 

30 

.75  lb. 

670 

9939 

475 

289 

188 

127 

87 

60 

41 

.56  lb. 

510 

8964 

419 

251 

160 

104 

69 

44 

27 

3  'A" 

.65  lb. 

555 

10290 

487 

295 

190 

127 

86 

58 

38 

.75  lb. 

605 

11797 

346 

226 

153 

106 

73 

50 

33 

.56  lb. 

470 

10377 

486 

292 

186 

123 

81 

53 

32 

4" 

.65  lb. 

515 

11926 

343 

222 

149 

101 

69 

45 

28 

.75  lb. 

555 

13672 

402 

264 

178 

124 

87 

60 

40 

B  M.  =1/10  Wli  For  B.M.=1/12  Wl«  add  20%  to  above  loads. 
For  B.M.=l/8  Wl>  deduct  20%  from  above  loads. 


Page  Five 


CENFIKE  '  STEEL  '  COMPANY 


Carnegie  Steel  Co.,  Office, 
Youngstown,  Ohio 


The  Hippodrome, 
Youngstown,  Ohio 
Self-Sentering  Roof 


Self -Sentering  Roof,  West 
Technical  High  School, 
Cleveland,  Ohio 


Cleveland  Pumping  Station 
The  Masters  &  Mullens 
Const.  Co.,  Cont. 


Large  Pitched 
Self -Sentering  Roof 
Detroit,  Mich. 


Egyptian  Theatre, 
Portland,  Oregon 
Edward  A.  Miller,  Arch 


Griffin  Wheel  Works. 
Vernon,  Calif. 


IsTF’HH'TS'li  STOt 


Machine  Shop  Roof, 
Seaboard  Air  Line, 
Savannah,  Ga. 


Columbus  Die  Tool  & 
Machine  Co.,  Columbus,  O. 
F.  L.  Packard,  Arch. 

J.  C.  Davidson,  Cont. 


A  Few  Types  of  Self-Sentering  Roofs 


Page  Six 


SELF-SENTEBINC^TBUSSIT 


Self-Sentering  Roofs 


REINFORCED  concrete  makes  the  ideal  type 
of  roof —  at  once  fireproof  and  enduring,  and 
*  with  practically  no  maintenance  expense. 
The  problem  has  been  to  make  a  concrete  roof  of 
reasonable  cost  and  weight .  Using  Self-Sentering  as  both 
form  and  reinforcement  overcomes  these  difficulties. 

First,  no  forms  are  required.  The  heavy  ribs  give 
ample  rigidity  to  support  the  weight  of  the  wet  concrete . 

Second,  the  large  sheets  permit  the  rapid  erection  of 
such  a  roof  with  a  minimum  labor  cost.  These  same 
large  sheets  require  the  fewest  possible  laps  which  also 
increases  labor  efficiency. 

Third,  the  slabs  need  be  but  2  or  3  inches  thick,  cutting 
the  dead  load  in  half  as  compared  with  the  ordinary 
concrete  roof.  This  is  not  only  a  saving  in  labor  and 
material  on  the  roof  itself,  but  very  often  permits  the 
use  of  much  lighter  supporting  framing. 

Though  Self-Sentering  Roofs  are  comparatively 
light,  a  study  of  the  Safe  Load  Tables  given  on  page 
5  shows  that  their  strength  is  far  in  excess  of  all  roof 
requirements. 

Self-Sentering  Roofs  are  particularly  adapted  to 
steel  frame  buildings,  but  they  are  used  economically 
and  effectively  on  wood  or  concrete  framing  as  well. 


The  sheets  are  merely  laid  over  the  roof  purlins, 
attached  to  them  securely  by  clips,  wire,  nails  or 
staples  and  the  concrete  applied  to  the  required  thick¬ 
ness.  Only  enough  passes  through  the  mesh  to 
thoroughly  bond  to  the  steel.  The  underside  is  then 
plastered  with  cement  mortar  and  the  roof  is  com¬ 
plete,  ready  for  waterproofing. 

Self -Sentering  opens  up  a  comparatively  new 
field  for  concrete  roofs,  namely,  on  buildings 
where  pitched  roofs  are  desired.  Heretofore 
pitched  roofs  of  concrete  have  not  been  considered 
practicable  as  there  was  no  economical  method  of 
keeping  the  concrete  in  place  on  the  inclined  surface 
until  it  had  set.  Self-Sentering,  in  addition  to  acting 
as  form  and  reinforcing,  also  gives  a  bond  for  the 
concrete  so  that  it  is  readily  used  on  roofs  of  any  char¬ 
acter —  pitched  roofs,  domes,  saw-tooth  or  flat  — 
and  at  practically  the  same  cost  for  one  as  for  the 
other. 

Self-Sentering  allows  such  a  diversity  of  roof  con¬ 
struction  that  it  has  considerable  architectural  value 
and  as  a  result  it  is  being  used  on  buildings  where 
concrete  roofs  formerly  could  not  be  considered.  For 
complete  specifications,  see  page  13. 


Self-Sentering  Roof,  Underwood  Bldg.,  San  Francisco.  Architect,  L.  P.  Hobart,  Contractor,  H.  A.  Chalmers 


Page  Seven 


STEEL  '  COMPANY 


Details  of  Self-Sentering  Roofs 


Details  of  some  of  the  various  types  of  Self-Senter¬ 
ing  roofs  are  here  shown.  The  method  of  using  this 
material  and  the  variety  of  purposes  it  can  be  made  to 
serve  are  limited  only  by  the  skill  of  the  engineer  or 
his  familiarity  with  the  qualities  of  Self-Sentering. 


A  Temporary  Self-Sentering  Roof  Over  Future  Floor 


The  type  of  roof  shown  in  the  above  detail  is  for  temporary  use  in  build¬ 
ings  designed  for  future  additions.  Where  ordinarily  a  cinder  fill  is  used 
to  obtain  the  necessary  pitch,  Self-Sentering  enables  the  roof  to  be  built 
up  to  the  desired  pitch  on  wood  framing.  In  a  large  roof  this  eliminates 
the  dead  load  and  other  complications  resulting  from  the  uneven  loading 
of  the  roof  by  cinder  fill,  and  forms  a  much  better  insulation. 


Page  Eight 


SELF-SENTEEING  ^TEUSSIT 


Details  of  Self-Sentering  Roofs 


Detail  of  Self-Sentering  Saw-Tooth  Roof 


Detail  of  Ordinary  Pitched  Roof  on  Structural  Framing.  Self-Sentering 
Attached  to  Steel  Channel  with  No.  7  Clips 


For  Monitor  type  roofs  Self-Sentering 
is  used  for  both  walls  and  roof.  The 
versatility  of  Self-Sentering  is  shown  in 
the  varied  number  of  types  of  roof  con¬ 
struction  to  which  it  is  adapted.  Where- 
ever  areas  are  to  be  covered,  this  material 
provides  a  roof  that  is  light,  economical 
and  permanent. 


Detail  of  Monitor  Roof 
Self-Sentering  Construction 


Page  Nine 


GENFIBE ' STEEL 


COM  PA 


Methods  of  Erecting  Temporary  Supports 
Required  on  Long  Spans 


Page  Ten 


Extreme  Simplicity  of  Erecting  Temporary  Supports  on  Long  Spans 


S E LF-SENTEEING  X  T EUSSIT 


Self-Sentering  Floors 


SELF-SENTERING  is  the  ideal  reinforcement 
for  every  type  of  concrete  floor.  It  can  be 
used  for  floors  supported  by  steel,  wood  or 
concrete  beams,  provides  great  strength  and  adds 
greatly  to  the  fire-safety  of  the  entire  structure. 

Because  Self-Sentering  is  both  form  and  reinforce¬ 
ment  the  expensive  part  of  concrete  floor  construction 
— form  work — is  eliminated  and  the  cost  of  the  com¬ 
pleted  floor  is  greatly  reduced. 

The  open  mesh-work  of  Self-Sentering  requires  a 
moderately  dry  concrete,  which  assures  a  minimum 
amount  of  water  and  a  correspondingly  stronger  slab. 

The  construction  of  Self-Sentering  floors  is  very 
similar  to  that  of  Self-Sentering  roofs,  with  the  ex¬ 
ception  that  the  floor  must  be  built  heavier  to  support 
the  greater  loads. 


Of  the  various  types  of  floor  shown  here  each  has 
its  individual  merits,  but  all  are  alike  in  certain 
respects,  viz.:  economy  in  erection  due  to  absence  of 
form  work,  great  strength  compared  to  their  light 
weight,  and  permanent,  fire-safe  and  sanitary  charac¬ 
teristics. 

Concrete  floors  have  easily  proved  themselves  the 
most  enduring  type,  and  with  expensive  form  work 
eliminated  by  Self-Sentering,  their  cost  has  been  re¬ 
duced  to  compare  favorably  with  all  other  types.  The 
use  of  lighter  slabs  made  possible  by  Self-Sentering 
has  cut  the  weight  to  a  minimum  permitting  other 
economies  in  the  design  of  structural  members. 

With  Self-Sentering  acting  as  form  and  reinforce¬ 
ment,  the  danger  of  premature  removal  of  forms  is 
impossible. 


Self-Sentering  Floor — Type  No.  1 


Self-Sentering  is  attached  direct  to 
steel  beams  by  clips,  the  concrete  applied 
to  the  desired  thickness  and  the  underside 
plastered  with  cement  mortar.  Sides  of 
beam  boxes  are  wired  together  to  save 
bracing  across  the  span.  To  permit  pour¬ 
ing  the  beam  haunching  at  the  same  time, 
punch  out  the  mesh  between  the  Self- 
Sentering  ribs  where  they  come  over  the 
beam. 


Cement  Plaster  J 

Hey  Lath 


Self-Sentering  Floor — Type  No.  2 

Concrete  5/ab ^ 


Self-Sentering  sheets,  with  ends  curved 
to  the  proper  radius  at  the  factory,  rest 
on  the  lower  flange  of  steel  beams,  serv¬ 
ing  both  as  reinforcing  and  centering 
for  the  slab,  and  as  a  form  for  the  fire¬ 
proofing  of  the  sides  of  the  beam.  The 
bottom  of  the  beam  is  wrapped  with 
Expanded  Metal  Lath  and  plastered  at  the 
same  time  as  the  underside  of  the  slab. 


Self-Sentering  Floor — Type  No.  3 


Self-Sentering  sheets  are  supported 
by  sides  of  beam  boxes  and  concrete 
applied  to  the  necessary  thickness  at  the 
same  time  beams  are  poured.  Underside 
to  be  plastered  after  beam  boxes  are  re¬ 
moved.  Self-Sentering  acts  as  both  form 
and  reinforcement. 


Self-Sentering  Floor — Type  No.  4 


ISA  Cone reie 


Self-Sentering  sheets,  curved  at  ends 
to  exact  radius  required,  are  placed  with 
ends  resting  on  bottom  board  of  beam 
boxes,  where  they  serve  as  form  and  rein¬ 
forcing  for  the  slab,  and  also  as  form  for 
the  sides  of  the  concrete  beam. 


Page  Eleven 


GEN  FI  EE  '  STEEL  '  COMPANY 


Municipal  Building, 
Geneva,  N.  Y. 

L.  P.  Adams,  Architect, 
R.  R.  Schnirel,  Cont. 


City  Hall, 
Youngstown,  Ohio 
Curved  Self-Sentering  Flc 


Union  Market  Building, 
St.  Louis,  Mo. 
Self-Sentering  Ceilings. 


Bryant  &  Chapman  Creamery, 
Hartford,  Conn. 

L.  D.  Bailey,  Arch. 


Apartment  Building. 

Evansville,  Ind. 
’-Sentering  Floors,  Roofs 
and  Columns. 


Boys’  High  School, 
Louisville,  Ky. 

J.  Earl  Henry,  Arch., 
iiley  &  Koemer,  Cont. 


Some  Self-Sentering  Floors  and  Ceilings 


Page  Twelve 


S E LF-S E N  T  E  E I N  G  ^  T E U 8 S I T 


Self-Sentering  Roof  and  Floor  Specifications 


1  —  Self-Sentering 

Self-Sentering  with  ribs  3%  inches  center  to  center 
manufactured  by  the  Genfire  Steel  Company,  Youngs¬ 
town,  Ohio,  shall  be  used  on  all  concrete  roofs  and 
floors  as  indicated  on  plans.  The  Self-Sentering 
shall  be  rigidly  attached  to  supporting  members  by 
special  clips  supplied  by  the  manufacturer  or  by  tie 
wire  (No.  18  gauge  preferred). 

(NOTE:  See  Safe  Load  Tables  for  weight  and  areas  of 
Self -Sentering  and  thickness  of  slab  for  various  spacing 
of  supports,  page  5.) 

The  clips  or  tie  wire,  securing  the  Self-Sentering  to 
the  supports,  shall  be  spaced  not  more  than  7V4  inches 
apart,  i.  e.,  one  clip  at  every  other  rib  at  each  bearing 
point  and  clamped  so  that  the  Self-Sentering  is  firmly 
held  in  place. 

The  side  ribs  of  Self-Sentering  sheets  shall  inter¬ 
lock  and  be  securely  fastened  together  by  clinching 
with  a  special  punch;  the  ends  to  lap  at  least  4  inches 
where  lap  comes  over  support  and  not  less  than  8 
inches  if  laps  occur  between  supports.  Where  sheets 
lap  between  supports,  ends  of  adjoining  sheets  shall 
be  securely  fastened  together  by  punching  or  wiring. 

2  —  Concrete 

Proper  planking  shall  be  placed  on  top  of  sheets  to 
enable  workmen  to  wheel  concrete  without  damaging 
the  Self-Sentering. 

Concrete  to  form  a  slab  of  the  required  thickness 
shall  then  be  placed  on  top  of  the  Self-Sentering  and 
shall  consist  of  a  mixture  of  one  part  Portland  cement, 
two  parts  of  clean  sand,  and  four  parts  of  fine  gravel 
or  crushed  stone  to  pass  a  V2  inch  screen  and  of 
a  consistency  which  will  permit  the  concrete  to  key 
through  the  mesh  of  Self-Sentering  without  waste  by 
dripping.  Top  shall  be  floated  smooth. 

(NOTE:  The  thickness  of  concrete  above  the  mesh  of 
Self-Sentering  shall  depend  upon  the  strength  of  slab 
required .  See  Safe  Load  Tables.) 

Concrete  should  be  deposited  over  supports  and 
spread  towards  center  of  span. 

3  —  Plastering  Underside 

When  the  slab  has  thoroughly  set,  the  underside 
shall  be  plastered  with  one  coat  of  cement  plaster  to  a 
thickness  of  */2  inch. 

This  coat  shall  consist  of  a  mixture  of  one  part 
Portland  cement  (gauged  with  1-10  its  volume  of 
lime),  2^/2  parts  clean,  sharp  sand,  with  the  addition 
of  a  small  amount  of  hair  to  assist  adhesion. 


4  —  Expansion  Rods 

(NOTE:  Required  on  all  roofs,  recommended  for  floors 
as  well.  The  manufacturers  of  Self-Sentering  furnish  a 
special  No.  5  rod  .207  inches  in  diameter  for  this  purpose.) 

Round  rods  having  a  sectional  area  of  about  .03 
square  inches,  shall  be  placed  24  inches  on  centers  on 
top  of  the  ribs  and  at  right  angles  to  them  to  take  up 
expansion. 

5  —  Roofing 

After  the  concrete  has  set  an  approved  brand  of 
roofing  shall  be  applied. 

6  -  -  With  Wood  Beams 

Where  supporting  members  are  of  wood,  suitable 
wire  staples  (14/2  inch,  No.  10-gauge  galvanized,  with 
a  %  inch  spread  preferred)  shall  be  used  to  secure 
the  Self-Sentering  in  position.  Self-Sentering  sheets 
shall  be  stapled  to  supports  not  more  than  7*/4  inches 
apart,  i.e.,  one  staple  to  every  other  rib  at  each 
bearing  point. 

Sheets  shall  be  fastened  together,  concrete  applied 
and  underside  plastered  as  on  steel  construction. 

7  —  Mosaic  or  Terrazzo  Floors  over 

Wooden  Joists 

Over  wooden  joists  shall  be  laid  one  layer  of  black, 
waterproof  building  paper;  over  this,  .56  lbs.  Self- 
Sentering  with  ribs  up  and  across  the  joists;  on  this 
shall  be  placed  IV2  inches  of  concrete  to  consist  of 
one  part  Portland  cement,  two  parts  clean,  sharp  sand 
and  four  parts  rock  having  a  maximum  dimension  of 
3/4  inch.  Concrete  shall  be  thoroughly  mixed  to  a 
quaking  or  jelly-like  consistency  and  applied.  Wooden 
screeds  14/2  inches  thick  shall  be  laid  so  concrete 
can  be  screeded  off  to  an  accurate  thickness  and 
be  made  smooth  and  level,  forming  a  base  for  tile, 
terrazzo,  marble,  etc. 

8  —  With  Concrete  Beams 

Where  concrete  beams  are  used  with  flat  slabs, 
the  ends  of  the  Self-Sentering  sheets  shall  rest  on 
edges  of  beam  boxes,  extending  into  the  concrete 
beam  approximately  2  inches.  Sides  of  beam  boxes 
may  be  wired  together  to  save  bracing.  With  arched 
slabs  the  ends  of  the  Self-Sentering  sheet  shall  rest 
on  the  bottom  board  of  the  beam  box,  and  shall  be 
lightly  fastened  to  prevent  displacement  while  pour¬ 
ing.  In  other  respects  the  work  shall  be  performed 
in  the  same  manner  as  with  structural  steel  framing. 


Page  Thirteen 


GENFIEE  '  STEEL  '  COMPANY 


Self-Sentering  Ceilings 


FOR  firesafe  ceiling  work,  where  suspended 
ceilings  are  required,  or  where  beams  or  other 
supports  are  too  far  apart  to  permit  the  use  of 
metal  lath  without  cross  furring,  Self-Sentering  offers 
an  economical  type  of  construction.  In  this  capacity 
it  acts  as  both  lath  and  furring,  the  heavy  ribs  taking 
the  place  of  small  channels  or  angles  necessary  with 
metal  lath  and  the  diamond  mesh  connecting  fabric 
forming  a  perfect  plastering  surface.  The  Self- 
Sentering  is  secured  by  clips  or  wiring  to  all  beams  or 
hangers  at  alternate  ribs,  these  supports  being  spaced 
from  3  to  5  feet  on  centers.  Due  to  the  close  spacing 
(3%  inches,  center  to  center)  of  the  Self-Sentering 
ribs,  an  unusually  firm  surface  is  afforded  for  the 
plaster  and  necessary  strength  is  developed  to  support 
the  ceiling  load. 

In  addition  to  the  added  strength  given  to  such  a 
ceiling  by  reason  of  the  closely  spaced  ribs,  the  elimina¬ 
tion  of  all  furring  and  labor  entailed  in  its  application 
results  in  considerable  saving  in  time  and  material. 
The  large  sheets  of  Self-Sentering  permit  very  rapid 
erection  of  such  a  ceiling,  reducing  the  number  of 
laps  and  cutting  labor  costs. 


Ceiling  Specifications 

1  —  Material 

For  all  suspended  ceilings,  Self-Sentering,  manufactured  by 
the  Genfire  Steel  Company,  Youngstown,  Ohio,  shall  be  placed 
with  lath  surface  down  and  attached  to  lines  of  support  at  every 
other  rib,  either  by  No.  14  gauge  wire  or  by  special  clips. 

2  —  Supports 

Supports  shall  be  hung  from  roof  or  floor  slabs  by  )4  x  1 
inch  flats  or  by  34  inch  rounds.  Supports  (excepting  regular  floor 
beams)  shall  be  1)4  inches  cold-rolled  channels. 

3  —  Spacing  of  Supports 

When  .56  lb.  Self-Sentering  is  used,  spans  shall  not  exceed 

4  feet;  when  .65  lb.  Self-Sentering  is  used,  spans  shall  not  exceed 
6  feet;  when  .75  lb.  Self-Sentering  is  used,  spans  shall  not  exceed 
8  feet. 

4  —  Lapping  Sheets 

Sides  and  ends  of  adjoining  sheets  shall  be  securely  interlocked 
and  fastened  every  2  feet  along  the  sides  and  at  every  other  rib 
of  the  ends  by  wiring.  End  laps  over  supports  shall  be  4  inches  and 
between  supports  8  inches,  the  latter  to  be  staggered,  if  possible. 

5  —  Plaster 

Plaster  shall  be  of  the  same  quality  as  specified  for  other  parts 
of  the  building.  (NOTE:  Plaster  should  contain  double  the 
amount  of  hair  or  fibre  required  for  wood  lath  work.) 


Union  Station,  Denver,  Col.  42,756  sq.  ft.  .75  lb.  Armco  Ingot  Iron  Self-Sentering  used.  Architects,  Gove  &  Walsh,  Denver. 
Contractors,  General — Stocker  &  Fraser,  Denver.  Plasterer,  Anthony  Hobson.  Denver 


Page  Fourteen 


SIELF-SIENTIEEING  ^  TEUSSIT 


Details  of  Self-Sentering  Ceilings 


Self-Sentering  Ceiling  Applied  Directly  on  Steel  Beams 


Self-Sentering  Ceiling  Suspended  from  Steel  Beams  and  Concrete  Slab 


*3  Wire 
Hanger’ 


I'/z  QF Channel  * 
*  vj 


5 


Cemenf  Plaster £ 


5e/f-5en  term 


y 


Methods  of  Hanging  Self-Sentering  Suspended  Ceilings  from  Tile  and  Concrete  Slabs 


y-M . .  M 'Jifh-J 

\  -V  <  '  <1 

o' 

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■rt 

A. 

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■- 

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■•0  .  V.  P.'V 

W?  F>  -0  ■  V  V‘  } 

—  'A  Pound  4-0  o.-c. 

Channel 

r'*~S e WSentenncj  f. Cement  Piaster 


Self-Sentering  Ceiling  Suspended 
from  Fireproof  Steel  Beams 


Page  Fifteen 


Curved 

Self-Sentering 

While  curved  or  arched  construction  is 
recognized  as  the  strongest  type,  the  ex¬ 
pense  of  curved  form  work  has  been  almost 
prohibitive.  Self-Sentering,  acting  as  both 
form  and  reinforcement,  removes  this  ob¬ 
jection.  The  illustrations  show  a  few  of 
the  shapes  to  which  Self-Sentering  may  be 
curved. 

Self-Sentering  can  be  curved  at  our 
factory  to  any  desired  radius  —  12  inches 
or  larger,  with  ribs  always  on  the  outside 
of  the  arc.  This  bending  is  done  by  special 
rolls  which  insure  uniformity  in  the  curve 
not  otherwise  obtainable  and  the  cost  of 
this  work  done  in  the  factory  is  much 
lower  than  if  done  on  the  job. 

Curved  Self-Sentering  is  adaptable  for 
arched  floor  or  roof  slabs,  silos,  tanks, 
conduits,  chimneys  or  culverts — any  curved 
work  where  the  stresses  follow  the  line  of 
the  curve.  On  work  where  the  ribs  run  at 
right  angles  to  the  curve,  the  material  can 
be  readily  curved  as  it  is  placed,  due  to  its 
uniform  pliability. 


Instructions  for  Ordering  Curved  Sheets 


Any  portion  of  a  circle  with  a  radius  of  12  inches  or  more,  up 
to  a  complete  circumference,  or  sheets  with  center  portion  flat 
and  one  or  both  ends  curved  to  any  radius,  12  inches  or  more, 
may  be  obtained,  with  the  exception  that  the  .56  lb.  weight 
cannot  be  curved  to  a  smaller  radius  than  15  inches.  In  any 
case  Self-Sentering  can  be  furnished  curved  with  the  ribs  on  the 
outside  of  the  arc  only. 

The  ordering  of  curved  Self-Sentering  involves  no  complicated 
figures  for  only  a  few  simple  dimensions  are  required  —  the 
exact  length  of  the  chord  as  indicated  by  C  on  the  sketch  shown, 
and  the  height  of  rise  as  indicated  by  D.  Where  possible,  the 
radius  to  which  the  sheets  are  to  be  curved  should  be  given. 
For  a  complete  circle,  such  as  for  pipes,  simply  give  the  required 


diameter.  For  sheets  curved  at  the  ends  and  flat  in  the  center, 
give  the  width  of  the  span,  the  height  of  rise  and  the  radius  of 
the  curved  portions. 


Page  Sixteen 


Self-Sentering  and  Trussit  for  Small  Buildings 


Small  buildings,  when  constructed  with  Trussit  and 
Self-Sentering,  are  easy  to  erect,  are  low  in  cost  and 
extremely  firesafe. 

Too  often,  industrial  firms  neglect  their  small  build¬ 
ings  and  as  a  result  have  their  plants  blemished  and 
endangered  by  unsightly ,  easily  inflammable  structures . 
There  is  absolutely  no  economy  in  using  wood  or  sheet 
iron  when  permanent,  firesafe  and  distinctive  appear¬ 
ing  small  buildings  can  be  constructed  with  Trussit 
and  Self-Sentering  at  a  very  reasonable  cost. 

Garages,  oil  houses,  filling  stations,  paint  store¬ 
houses  and  other  small  buildings  should  always  be  of 
firesafe  construction.  Isolated  buildings  such  as 
those  on  farms  or  in  small  villages  secure  fire  protec¬ 
tion  at  a  minimum  of  cost  through  the  use  of  Genfire 
products. 

Construction  of  small  buildings  with  Genfire 
materials  is  easy.  A  light  steel  framework  is  usually 
set  up,  and  to  it  is  fastened  the  sheets  of  Trussit. 
Where  the  roof  load  is  very  light,  a  temporary  wood 
framework  is  all  that  is  required.  As  soon  as  the 
Trussit  reinforced  walls  harden  sufficiently,  the  sup¬ 


ports  are  removed,  leaving  permanent,  sturdy  walls 
of  cement. 

The  roof  is  constructed  with  light  steel  trusses, 
which  support  the  Self-Sentering  sheets.  As  no 
forms  are  required  the  concrete  is  applied  directly  over 
the  Self-Sentering,  the  result  being  an  enduring,  water¬ 
tight  and  firesafe  roof. 

Trussit  is  especially  adaptable  for  building  2 -inch 
solid  walls  and  partitions  without  the  use  of  studding. 
Its  advantages  have  been  outlined  in  other  parts  of 
this  book. 

Self-Sentering  is  unexcelled  for  use  in  short  span 
concrete  slabs  without  the  use  of  form  work.  From  a 
cost  standpoint,  concrete  construction  for  small  build¬ 
ings  involving  the  use  of  Trussit  or  Self-Sentering,  or 
both,  has  no  equal.  These  two  products  put  per¬ 
manent,  firesafe,  weather-proof,  pleasing -looking 
structures  within  the  reach  of  all. 

Limitation  of  space  prevents  a  more  detailed 
description  of  Trussit  and  Self-Sentering  used  in  small 
buildings,  but  our  engineering  department  may  be 
called  on  at  any  time  for  additional  information. 


Various  types  of  Firesafe, 
permanent  small  buildings, 
economically  erected  with 
Self-Sentering. 


^  rm.n  as , 


Page  Seven  teen 


GENFIBE  '  STEEL  '  COMPANY 


Self-Sentering  for  Steps,  Stairs  and  Seat  Risers 


The  use  of  Self-Sentering  entirely  eliminates  the 
expensive  false  work  formerly  required  for  concrete 
stairs  and  similar  construction.  This  alone  recom¬ 
mends  it  for  the  work.  Other  important  results  are  a 


saving  of  labor  and  material,  and  a  lighter,  stronger 
finished  job. 

Several  illustrations  of  the  use  of  Self-Sentering  for 
stairs  and  seat  risers  are  shown  below. 


Self-Sentering  acting  as  form  and 
reinforcing  for  both  risers  and  treads. 


Self-Sentering  as  form  and  rein¬ 
forcement  for  grandstand  seats,  chair 
platforms  in  theatres  and  similar  build¬ 
ings.  2} '2"  or  3"  of  concrete  should 
always  be  used  for  best  results  in  fasten¬ 
ing  chairs,  etc. 


For  seats  in  grandstands,  for  chair 
platforms  in  theatres  and  similar  build¬ 
ings,  Self-Sentering  can  also  be  used  to 
marked  advantage,  making  unneces¬ 
sary  the  heavy,  solid  masonry  ordi¬ 
narily  required  and  at  the  same  time 
eliminating  complicated  form  work. 
The  detail  shown  here  is  one  used  in  a 
large  theatre  building  in  Chicago. 


Page  Eighteen 


8  E  1IL  F-SENT  E  B I NG  S  TRUSS  I X 


Self-Sentering  for  Walls  and  Partitions 


The  convenient  size  of  the  sheets — -29  inches  wide 
and  ranging  from  4  to  12  feet  in  length — and  the 
absence  of  accessories  necessary  for  installation — 
facilitate  the  erection  of  Self-Sentering  walls  and 
partitions.  Laps  fit  tight  and  when  covered  with 
cement  plaster  become  as  solid  and  permanent  as  the 
rest  of  the  wall.  These  walls  are  conspicuously  free 
from  cracking  and  require  no  repairs  or  attention 
after  they  are  once  constructed. 

Solid  Partitions 

Inherent  qualities  which  make  Self-Sentering  with¬ 
out  equal  as  reinforcing  for  roofs  and  floors  hold  true 
when  this  product  is  used  for  non-bearing  walls  and 
partitions.  Studding  and  formwork  are  eliminated. 

Because  of  the  strength  of  the  reinforcing,  walls 
need  be  only  two  inches  thick,  thus  saving  considerable 
floor  space.  As  the  ordinary  partition  is  6  inches  thick, 
an  additional  foot  of  floor  space  is  available  for  each 
three  lineal  feet  of  partitions. 


Self-Sentering  walls  are  fire-resistive,  soundproof, 
sanitary  and  economical,  and  are  especially  adapted 
for  partitions  in  hospitals,  schoolhouses  and  apart¬ 
ment  houses. 

(See  page  28  for  specifications). 

Curtain  Walls 

Cement  curtain  walls  that  add  considerably  to  the 
appearance  and  value  of  a  building  are  quickly  and 
economically  erected  when  Self-Sentering  is  used  as 
reinforcing.  No  forms  are  necessary,  for  the  sheets 
of  Self-Sentering  are  set  in  place,  firmly  fastened  to 
the  structural  members  supporting  the  floors  or 
roofs,  then  covered  inside  and  out  with  cement  plaster. 

This  type  of  construction  is  especially  adaptable 
to  industrial  buildings,  and  does  away  with  unsightly 
heat  and  cold  conducting  corrugated  iron  walls  which 
require  frequent  painting. 

(See  page  29  for  specifications). 


Self-Sentering  Partitions  are  Economical  to  Erect  and  Save  Floor  Space 


P  a  Nineteen 


GENFIKE  '  STEEL  '  COMPANY 


Self-Sentering  in  Wood  Frame  Buildings 


Wood  Frame  Buildings  are  particularly  benefitted 
through  the  use  of  Self-Sentering  on  walls,  floors,  roofs 
and  ceilings — the  cement  construction  is  an  effective 
fire  stop  and  prolongs  the  life  of  a  wood  structure  by 
protecting  it  from  moisture,  wood-boring  worms  and 
decay. 

This  economical  type  of  construction  is  adaptable 
to  practically  any  structure.  Factories,  storerooms, 
apartments,  houses,  hospitals,  stores,  offices,  etc.,  are 
protected  from  fire  and  made  more  permanent  by  the 
use  of  Self-Sentering. 

Self-Sentering  partitions,  when  used  in  buildings 
having  brick  walls  and  wood  framing  and  floors,  offer 
sufficient  resistance  to  an  ordinary  blaze  to  confine 
it  in  one  room,  whereas  less  fire-retardant  partitions 
might  permit  the  fire  to  spread  throughout  the 
building. 

Because  of  its  stiff  ribs,  Self-Sentering  is  quickly 


set  in  place  and  economically  plastered.  Its  strength 
makes  possible  wide  spacing  of  supports  and  the  use 
of  few  temporary  supports  and  no  permanent  studs 
in  solid  partitions  and  curtain  wall  construction. 

The  advantages  of  Self-Sentering  on  wood  joists 
floors  are  many.  Self-Sentering  is  laid  directly  on 
the  joists,  rib  side  up,  and  stapled  in  place.  It  is 
immediately  ready  to  receive  the  concrete  without 
forms  or  temporary  supports  of  any  kind.  Nailing 
strips  or  wood  sleepers  placed  in  position  before  the 
concrete  is  poured  permit  any  desired  floor  finish. 
Aside  from  its  fire  resistive  features,  this  type  of  floor 
is  very  economical  to  construct,  forms  an  ideal  base 
for  tile,  is  light  and  deadens  sound. 

GF  No.  10  Integral  Waterproofing  paste,  applied 
to  the  cement,  both  eliminates  dampness  and  increases 
the  compressive  strength  of  the  material  and  should 
be  used  for  all  floors  of  this  kind. 


Self-Sentering  Partitions  Add  Permanence  and  Fire-Safety  to  Wood  Construction 


Page  Twenty 


Self-Sentering  for  Miscellaneous  Uses 


Self-Sentering  has  been  applied  to  such  a  great 
variety  of  uses  that  it  is  impossible  to  classify  all  of 
them  under  specific  kinds  of  construction.  Because 
of  its  remarkable  adaptability,  its  flexibility,  its 
strength  and  economy  in  erection  (for  no  forms  are 
necessary),  Self-Sentering  has  been  used  on  many 
special  jobs,  and  new  applications  are  constantly 
being  discovered. 

On  this  page  are  shown  photographs  of  a  few  of  the 
more  unusual  uses  to  which  Self-Sentering  has  been 
put.  The  Self-Sentering  Heating  Tunnels  in  a  manu¬ 
facturing  plant  in  Clinton,  Iowa,  are  especially  inter¬ 
esting.  Even  the  elbows  were  made  with  this  product 
and  the  total  cost  was  far  less  than  if  the  tunnels  had 
been  constructed  with  wooden  forms. 

The  uses  of  Self-Sentering  are  unlimited.  This 
product  has  become  almost  as  universal  in  use  as 
concrete  itself  and  it  constantly  suggests  and  makes 
possible  many  new  uses  for  reinforced  concrete. 


Curtis  Bros.  Co.  Factory 
Building,  Clinton,  Iowa. 
Curved  Self-Sentering  for 
Heating  Tunnels.  R.  L. 
Sieg,  Architect,  Logan 
Bros.,  Contractors. 


Curved  Self-Sentering  in 
Place  Ready  for  Concrete 


Other  unusual  forms  of  construction  in  which  Self- 
Sentering  has  been  used  are  curved  tanks  and  vats, 
silos,  small  bridges  and  culverts,  spherical  domes  for 

observatories  and  churches  and  even  wayside  shrines.  It  has  become  one  of  the 
most  popular  forms  of  construction  for  small  homes  in  the  Tropics,  where 
dampness  and  insects  would  quickly  destroy  wood  and  where  poured  concrete 
would  be  too  expensive  for  the  laboring  classes. 


Self-Sentering  in  Elbow 
Formation,  Showing  What 
Can  be  Done  With  This 
Material  in  Providing 
Form  Work  for  Concrete 
Construction 


.  .  ..  • 


Sewage  Disposal  Tanks,  Columbus,  Ohio.  Baffle  Walls  of  Self-Sentering  Construction 

Designed  by  J.  J.  Morgan 


Page  Twenty-one 


GEN  FI  EE  '  STEEL  '  COMPANY 


Railroad  station,  Caddo, 
Oklahoma.  Walls  of  Trussit. 


Texas  Portland  Cement 
Company,  Houston.  Trussit 
walls. 


Athletic  Field,  Haverhill, 
Mass.  Trussit  fence. 


Plastering  a  Trussit  Parti¬ 
tion.  Crown  Knitting  Mills, 
Mohrsville,  Pa 


Hand  Ball  Court,  Y.  M.  C.  A 
Los  Angeles.  Trussit  wall. 


.-A 


A  Few  Solid  Trussit  Walls 


Trussit  fence.  N.  High 
School,  Minneapolis,  Minn. 


Trussit  fence.  Hood  Rubber 
Company, Watertown,  Mass. 


Page  Twenty-Two 


self-sentering:  ^trussit 

TRUSSIT 


A  Reinforcement  for  Walls  and  Partitions 


TRUSSIT  is  a  specialized  building  product, 
designed  for  the  purpose  of  reinforcing  and 
forming  fire-resistive  concrete  walls  and  par¬ 
titions.  In  this  field  it  has  unchallenged  leadership. 

Self-Sentering,  with  its  acknowledged  points  of 
superiority  over  similar  materials,  is  usually  used  for 
walls  when  it  is  already  specified  for  the  roofs  and 


floors  of  the  same  job.  It  adapts  itself  so  well  to  this 
usage,  and  is  so  much  better  than  any  other  type  of 
reinforcing,  except  Trussit,  that  it  meets  the  most 
rigid  requirements.  The  Genfire  Steel  Company  is  in 
an  enviable  position  to  be  able  to  recommend  either 
of  these  two  leaders.  Competing  only  with  ourselves, 
we  are  able  to  specify  the  best  material  for  the  job. 


Section  of  a  Sheet  of  Trussit  Showing  Uniform 
Distribution  of  Metal 


Trussit  is  a  corrugated  expanded  metal  sheet  for 
reinforcing  and  forming  fire-resistive  walls  and  par¬ 
titions.  Its  chief  advantages  are  these: 

No  studding  is  needed,  due  to  the  strength  and  rigid¬ 
ity  of  the  Trussit  design. 

Partitions  are  only  two  inches  thick.  As  a  result, 
there  is  a  saving  in  materials,  and  what  may  be  espe¬ 
cially  important,  a  considerable  saving  in  floor  space. 

Trussit  walls  are  shock-proof  and  will  resist  greater 
blows  than  any  ordinary  type  of  construction. 

As  Trussit  is  expanded  uniformly  in  both  directions, 
the  wall  has  equal  strength  from  either  side. 


It  is  so  interwoven  back  and  forth  through  the  cement 
or  plaster  that  it  becomes  an  integral  part  of  the  wall. 

Uniform  distribution  of  the  metal  overcomes  any 
tendency  towards  cracking  of  wall  through  expansion 
and  contraction,  in  any  direction,  due  to  changes  in 
temperature. 

Trussit  walls  are  fire-resistive. 

New  York,  with  the  most  severe  requirements  for 
fireproof  construction  of  any  city,  approves  the  use 
of  Trussit  in  partitions,  elevator  shafts  and  bulk¬ 
heads. 


Page  Twenty-Three 


GENFIBE  '  STEEL  '  COMPANY 


Trussit  Data 


Trussit  comes  in  the  standard  width  of  19  inches, 
and  is  carried  in  stock  in  8,  10  and  12  foot  lengths. 
Intermediate  lengths  may  be  obtained  from  stock, 
these  being  cut  from  the  next  longer  sheet  and  the 
waste  charged  to  the  customer. 


This  material  is  always  packed  10  sheets  to  the 
bundle,  and  is  either  painted  or  galvanized — -no  un¬ 
painted  or  ungalvanized  material  is  supplied. 


Trussit  is  made  in  the  following  weights  per  square 
foot: 


Weight  per  square  foot 

Painted 

Galvanized 

Armco 

.57  lbs 

.68  lbs. 

.57  lbs. 

.62  lbs. 

Not  made 

.62  lbs. 

.83  lbs. 

.88  lbs. 

.83  lbs. 

Trussit  cut  from  galvanized  and  Armco  Ingot  Iron 
Sheets  can  be  supplied  from  stock  in  8  foot  lengths 
only.  Orders  for  other  lengths  will  be  subject  to 
delays  incident  to  delivery  of  sheets  from  the  mill. 

Special  lengths  of  Trussit  cut  from  galvanized  or 
Armco  sheets  furnished  in  mill  shipments  of  5  tons 
minimum  of  one  length  and  weight  only. 


Trussit  Solid  Partitions 


TRUSSIT  is  the  basis  of  solid  partitions  erected 
without  studding.  These  partitions  show 
maximum  strength  and  rigidity  with  minimum 
weight,  embody  simplicity  of  construction  by  eliminat¬ 
ing  studding  and  have  a  wide  range  of  adaptability 
for  all  classes  of  buildings. 

Trussit  is  especially  suitable  for  solid  partitions  in 
hospitals,  schools,  apartments,  storerooms,  office 
buildings,  warehouses,  and  factories;  also  extensively 
used  for  elevator  and  air  shafts. 

The  use  of  Trussit  in  solid  partition  construction 
gives  a  wall  2  inches  thick  (slightly  more  for  extended 
heights),  constructed  without  studding  of  any  kind, 
and  making  an  absolutely  firesafe  plastered  partition. 
Statistics  from  large  conflagrations  show  that  these 
solid  partitions  are  the  most  durable  type,  even  when 
exposed  to  intense  heat. 

The  sound-proofness  of  the  2-inch  solid  partition  is 
a  very  important  feature  in  a  Trussit  wall.  When 
properly  fastened  to  the  floors  and  ceilings  this  wall 
is  unsurpassed  for  sound-proofness.  This  feature 
alone  makes  Trussit  solid  partition  walls  especially 
adaptable  to  use  in  schoolhouses,  hospitals  and  apart¬ 
ment  houses. 


The  space-saving  feature  of  such  a  partition  can¬ 
not  be  over-estimated.  When  compared  with  the 
ordinary  6-inch  partition,  a  Trussit  partition  means 
a  saving  of  one  square  foot  of  floor  space  to  every  three 
lineal  feet  of  partition.  In  warehouses,  storage 
buildings  and  hospitals,  these  thin  partitions  give 
maximum  usable  floor  space. 

This  increased  floor  space,  acquired  at  no  in¬ 
creased  cost,  often  is  just  enough  to  mean  the  dif¬ 
ference  between  efficient  and  non-efficient  arrange¬ 
ment  of  the  building’s  contents. 

Electrical  installations  are  very  easily  made  in 
two-inch  partitions  through  the  use  of  shallow  switch 
boxes  especially  built  for  this  work.  These  fittings 
can  be  obtained  from  a  number  of  reliable  manufac¬ 
turers. 

Trussit  makes  economical  partitions.  The  tempo¬ 
rary  bracing,  required  in  its  erection,  can  be  placed 
very  economically  and  quickly,  and  can  be  used  over 
and  over  again.  There  is  absolutely  no  waste  of 
plaster  as  the  first  coat  applied  forms  the  foundation 
for  the  coat  applied  on  the  reverse  side. 


Page  Twenty-four 


SELF-SENTERING 


TRUSSI1 


nr 


Trussit  Curtain  Walls 


Every  architect  and  engineer  has,  at  some  time, 
experienced  dissatisfaction  over  the  excessive  amount 
of  material  necessary  to  build  the  old  type  curtain 
walls.  These  walls  carry  no  loads,  their  sole  function 
being  to  keep  out  the  weather,  yet  their  thickness  is 
necessary  to  secure  the  proper  stability. 

Trussit  reinforced  cement  curtain  walls  are  fire- 
resistive — equal  to  brick,  tile,  or  poured  concrete  and 
cost  much  less.  The  slabs  are  of  minimum  thickness, 
yet  due  to  the  perfect  distribution  of  the  reinforcing 
metal,  they  are  strong  and  rigid.  Trussit  Curtain 
Walls  always  present  a  neat  and  uniform  appearance 
and  never  require  repairs.  They  cost  somewhat 
more  than  the  antiquated  corrugated  iron  walls  but 
are  much  more  durable  and  the  elimination  of  paint 
and  repair  bills  makes  them  more  economical  in  the 
end. 


Such  walls  are  easily  and  quickly  erected,  no 
studding  or  form  work  being  necessary.  The  sheets 
are  set  in  place,  securely  fastened  at  top  and  bottom , 
at  all  laps  and  to  such  structural  members  as  are 
in  place  to  support  floor  and  roof.  Cement  plaster  is 
then  applied  inside  and  out  and  the  walls  are  com¬ 
plete.  This  construction  is  particularly  adapted  to 
all  classes  of  industrial  buildings. 

The  light  weight  of  Trussit  Walls  makes  them 
feasible  where  other  forms  of  fireproof  curtain  walls 
cannot  be  used.  Such  walls  are  ideal  for  use  on  the 
steel  frames  of  mill  buildings  and  they  may  be  used 
where  the  difficulty  of  securing  good  foundations 
makes  a  heavy  brick  or  mass  concrete  wall  inadvisable. 

We  unhesitatingly  recommend  Trussit  for  all 
curtain  walls  where  appearance, permanence, strength, 
fire  retardance  and  insulation  against  heat  and  cold 
are  desired. 


Utica  Heater  Company  Building,  Whitesboro,  N.  Y.,  Trussit  Curtain  Walls 


Page  Twenty-five 


CENFIKE  '  STEEL  '  COMPANY 


Framing  of  Wood  Doors — Trussit  Partitions 


trussit 

Cement  Plaster 
~ /'Channel 
/  ,  2' Channel 


LMJ 

Section  D 
n  I  "Chon  net 
2  "Channel 


Wire- 


tea 

5echon B 


“Trussit  ” 
-Cement  Plaster 


'  Trussjfs 


Expanded  Metal/tngle 

Door  Frame 


Gas  Pipe 
or  Condo  if 


l<ey  Lalh 


Detail  showing  arrangement  of  large  pipes 
in  2"  Trussit  Partitions 


Pi  osier 

5echon C 


Typical  method  of  attaching  Trussit  or  Self- 
Sentering  to  floors,  ceilings  or  side  walls  of 
masonry  construction. 


Detail  showing  method  of  carrying  Con¬ 
duit  Pipe  and  Outlet  Box  in  Trussit  Par¬ 
titions  where  Trussit  is  erected  vertically 


Key  Lath 


G.F  Corner  Bead 


Framing  for  exposed  corners 
on  Trussit  Partitions. 


Jruss/t 

L  -  /  Channel 


PM 


2  Chan  net 


Section  B  'Cement 
I' Channel _ 

2  Channel 


Connecting 
/Ingle  ^ 


Laq5crens,y  Floor  Line 
Defail  at  Jt 


Key  Lath,  Gas  pipe  or  Conduit 


\q  *3  o  oj 

/->  tPYf\0' 

■  o  9  o  °  o 


Detail  showing  placing  of  Pipes  or  Con¬ 
duits  in  Trussit  Partitions 


Picture 

Pdouldpr 

“ Trussit 
erected 
vertically 

Chair  Rail 


Base 

Board 


Cement  Plaster 


Method  of  Fastening  Baseboard,  Chair  Rail  and  Picture 
Mould  to  Trussit 


Self-Sentering  may  be  used  wherever  Trussit  is  specified,  construction  details  being  the  same.  See  pages  19  and  23 


Page  Twenty- six 


SELF-S E N T E KIN G  ^  T K U S 8 1 T 


Slot 

Column  S 


Tt  HP 


C.pdip&y: 


:9 


1"  slots  are  cast  in  concrete 
during  pouring.  Trussit  is 
inserted  into  these  slots  and 
plastered 


Concrete 

Co/umnS 


Trass  if 


Attaching  Trussit  Walls  and 
Partitions  to  Concrete  Col¬ 
umn 


Wood  ph  ys  D 
16  c  c  '■  ... 


Cr/mpe 


Column-  D 
Line,  ^ 


1  Furririq ■  )  \ 

"  Wl 


Trussit 

J 


n 

ill 


Temporary  bracing  of  Trus¬ 
sit  Partitions.  If  supports 
are  too  far  apart  to  be 
spanned  by  one  brace,  the 
horizontal  braces  may  be 
braced  from  the  floor. 


"beifbentennpj" 


re  Tie 


Attaching  Trussit  Walls  and 
Partitions  to  concrete  con¬ 
struction 


One  method  of  attaching 
Trussit  to  walls  and  col¬ 
umns.  Wood  plugs  are  set 
in  concrete  and  expanded 
metal  angle  nailed  thereto. 
Trussit  is  wired  securely  to 
furring  strips  and  plastered 


Expanded  Meta , 
flnqte  connection 
.  wired  to 
Se/f-Sentermc/ 


-Self-Senlermg 
E"  Cement  Plaster 


Method  of  attaching  Self- 
Sentering  Partition  to  Sus¬ 
pended  Ceiling 


Detail  of  Method  of  attaching 
Trussit  Partition  to  Con¬ 
crete  Beam 


...  •  ..6 .  •  ■■ 

■  n  'Si  .  </  '  “ 

*<&  o  %  o  0':T*  £  a  T.  o  **■- 

■  ■■■/■■  .  -  s 


'  N' -O'-  O  N 

i  ;  K- 


Expanded  Metal  J Ingle 
attached  to  floor  with 
staples  and  to'  Trussit  ” 
w/rh  wire- 


Trussit " 

Cement  Plaster 


„  Staple ' 
Trussit  ” 
wired  to  Expanded) 
Meta!  /IngteU-M 


T  V  C*  JPPCi':  r 


Wood PtucfS  £4"  o-c 

Trussit" 

Ve  "C  em  ent  Pi  a  si e  r 


Herringbone  Expanded  Metal  Lam 

Expanded  Meta/  ftngleallach- 
ed  to  Joists  with  staples  and  to 
"Trussit" with  wire. 


~E" Cement  Plaster 
Trussit " 


Attaching  Trussit  Partitions  to  Tile  Floors 


Attaching  Trussit  Partitions  to  Wood  Floor  and  Ceiling  Joists  with 
Expanded  Metal  Angle 


Self-Sentering  may  be  used  wherever  Trussit  is  specified,  construction  details  being  the  same.  See  pages  19  and  23 


Page  Twenty-seven 


COMPANY 


Solid  Partitions  Specifications 


1  —  Material 

Trussit  (or  Self-Sentering),  as  manufactured  by  the 
Genfire  Steel  Company,  Youngstown,  Ohio  shall  be 
used  for  all  interior  partitions  as  indicated  on  plans. 

2  —  Weights  of  Material 

(a)  Trussit 

For  partitions  up  to  12'  in  height,  Trussit  weighing  .57 
pounds  per  square  foot  shall  be  used. 

For  partitions  from  12'  to  15'  in  height,  Trussit  weighing 
.62  pounds  per  square  foot  shall  be  used. 

For  partitions  from  15'  to  17'  in  height,  Trussit  weighing 
.83  pounds  per  square  foot  shall  be  used. 

(b)  Self-Sentering 

For  partitions  up  to  12'  in  height,  Self-Sentering  weighing 
.56  pounds  per  square  foot  shall  be  used. 

For  partitions  from  12'  to  17'  in  height,  Self-Sentering  weigh¬ 
ing  .65  pounds  per  square  foot  shall  be  used. 

For  partitions  more  than  17'  in  height,  Self- Sentering  weigh¬ 
ing  .75  pounds  per  square  foot  shall  be  used. 

3  —  Erection 

Trussit  (or  Self-Sentering)  shall  be  erected  with 
ribs  running  vertically.  Ribs  may  run  horizontally 
when  sheets  can  be  more  conveniently  attached  to 
structural  supports  of  the  building. 

Temporary  supports  shall  be  wedged  or  lightly 
nailed  in  place  on  5-foot  centers  when  ribs  run  hori¬ 
zontally.  When  ribs  run  vertically,  horizontal  brac¬ 
ing  shall  be  placed  sufficiently  strong  to  prevent 
deflection  while  plastering. 

The  metal  shall  be  rigidly  wired  or  clipped  to 
supports,  with  selvedge  or  side  ribs  interlocking  and 
an  end  lap  of  not  less  than  2  inches  over  supports. 
If  necessary  to  lap  sheets  between  supports,  allow 
about  8  inches  and  wire  sheets  together  securely 
where  lapped.  They  shall  be  attached  to  all  columns, 


door  and  window  framing  and  other  permanent 
supports . 

All  side  and  end  laps  shall  interlock  and  shall  be 
securely  wired  with  18-gauge  tie  wire  at  intervals  of 
about  12  inches.  The  sheets  shall  be  secured  to  floor 
and  ceiling  by  the  use  of  expanded  metal  angle  and 
other  methods  as  shown  in  details  herewith.  On 
Self-Sentering,  the  side  lapping  ribs  may  be  fastened 
together  by  clinching  with  a  special  punch  as  shown 
on  page  4. 

4  —  Trim 

Where  baseboards  or  picture  mouldings  are  re¬ 
quired,  wood  blocks  are  fitted  to  the  metal  before 
plastering,  nailed  or  wired  together  and  the  moulding 
or  baseboard  nailed  to  these  blocks  as  shown. 

5  —  Plastering 

The  side  opposite  temporary  studding  shall  be 
plastered  first.  Cement  plaster  shall  be  used,  to 
consist  of  one  part  Portland  cement,  three  parts  sand 
and  a  small  amount  of  hair,  tempered  with  hydrated 
lime  or  lime  paste  (preferably  about  1-10  by  volume 
of  cement).  This  mortar  shall  be  applied  to  a  depth 
of  %  inch  over  the  ribs  of  the  metal  and  floated  to  an 
even  surface.  (Ordinary  patent  plasters  can  be  used 
for  inside  work,  with  good  results,  but  cement  plaster 
is  recommended.) 

After  the  first  coat  has  set,  the  temporary  studding 
is  removed  and  the  opposite  side  plastered  in  the  same 
manner.  The  total  thickness  of  the  partition  shall 
be  approximately  2  inches.  (If  thicker  walls  are 
desired  it  is  only  necessary  to  apply  additional  coats 
of  plaster  until  the  required  thickness  is  obtained. 
This  thickness  should  not  exceed  3V2  inches). 


Self-Sentering  may  be  used  wherever  Trussit  is  specified,  construction  details  being  the  same. 


See  pages  19  and  23 


Page  Twenty-eight 


TEUSSII 


Curtain  Wall 

1  —  Material 

Trussit  (or  Self-Sentering)  as  manufactured  by  the 
Genfire  Steel  Company,  shall  be  used  as  a  reinforce¬ 
ment  for  all  exterior  curtains  walls  as  indicated  on 
plans. 

2  —  Weights  of  Material 

(a)  Where  supports  are  spaced  6  feet  on  centers,  walls  shall 
be  2  inches  in  thickness,  using  Trussit  weighing  .57  pound  per 
square  foot  (.56  pound  Self-Sentering). 

(b)  Where  supports  are  spaced  8  feet  on  centers,  walls  shall 
be  2  inches  in  thickness,  using  Trussit  weighing  .62  pound  per 
square  foot  (.56  pound  Self-Sentering). 

(c)  Where  supports  are  spaced  10  feet  on  centers,  wall  shall 
be  2)4  inches  in  thickness,  using  Trussit  weighing  .62  pound  per 
square  foot  (.56  pound  Self-Sentering). 

(d)  Where  supports  are  spaced  12  feet  on  centers,  walls  shall 
be  2l/2  inches  in  thickness,  using  Trussit  weighing  .83  pound  per 
square  foot  (.56  pound  Self-Sentering). 

3  Erection 

Where  supports  are  more  than  6  feet  apart,  tempo¬ 
rary  bracing  shall  be  provided  on  6  feet  centers  to 
give  a  firm  plastering  surface  until  one  side  has  been 
plastered. 

Sheets  are  to  be  securely  fastened  to  columns  and 
other  permanent  supports  at  intervals  not  to  exceed 
7V4  inches,  the  corrugations  or  ribs  running  in  the 
direction  of  the  shortest  spans. 

Where  structural  supports  are  used,  Trussit  (or 
Self-Sentering)  shall  be  attached  by  special  clips, 
which  can  be  secured  from  manufacturers,  or  by 
wiring.  On  wood  supports,  staples  shall  be  used;  for 
reinforced  concrete,  any  method  shown  in  the  details 
herewith  may  be  used. 

Side  selvedge  edges  or  side  ribs  of  all  sheets  shall  be 
securely  interlocked  and  wired  together  with  No.  16- 
gauge  tie  wire  at  intervals  not  to  exceed  1  foot  (On 


Specifications 

Self-Sentering,  side  laps  may  be  secured  by  clinching 
with  a  special  punch  as  shown  on  page  4).  The  ends 
of  sheets  shall  lap  8  inches  if  laps  occur  between  sup¬ 
ports  and  not  less  than  2  inches  if  over  supports. 
Laps  between  supports  shall  be  staggered  if  possible. 

4  —  Plastering 

A  scratch  coat  shall  be  applied  on  the  outside  first, 
and  shall  consist  of  one  part  Portland  cement  and 
three  parts  of  clean,  well  graded  sand  with  a  small 
amount  of  hair,  and  only  enough  hydrated  lime  or  lime 
paste  to  insure  a  smooth  working  mortar.  (Preferably 
about  1-10  the  volume  of  cement.)  This  coat  shall 
cover  the  ribs  and  shall  be  well  worked  into  the  mesh. 
When  partly  set  this  coat  shall  be  well  scratched  to 
receive  the  finish  coat. 

When  the  first  coat  has  set,  any  temporary  bracing 
shall  be  removed  and  the  inside  coat  applied  which 
shall  be  of  the  same  mix  as  for  the  exterior  and  shall 
cover  the  ribs  about  V4  inch. 

The  inside  coat  shall  then  be  applied  consisting  of 
one  part  Portland  cement  to  two  and  one-half  parts 
clean,  well  graded  sand,  with  GF  No.  10  Integral 
Waterproofing  added  in  the  amount  of  2  per  cent  of 
the  cement. 

NOTE:  If  a  thicker  wall  is  required ,  another  inside  coat 
may  be  added,  using  either  the  same  mix  as  for  the  first 
two  coats  or  varying  it  by  using  coloring  matter,  white 
cement,  or  white  sand  to  give  the  desired  color.  The 
outside  coat  may  also  be  varied  in  the  same  manner  if 
desired. 

The  finished  work  shall  be  protected  from  too  rapid 
setting  by  wind  or  sun  for  several  days,  either  by 
spraying  or  by  hanging  wet  burlap  curtains  in  front 
of  the  wall.  Extra  care  should  be  given  the  entire 
exterior  of  the  wall. 


Building  of  Parker  Rust  Proof  Co.  of  America,  Detroit,  Mich.  Self-Sentering  Curtain  Walls. 
Erected  by  Cooper- Weidman  Construction  Co.,  Detroit,  Mich. 


Page 


T  w  e  n t  y -nine 


CENFIKE  '  STEEL  '  COMPANY 


Trussit  Wired 
to  Self- 
Centering. 


Poof  Stab 
“ 7  Self- Centering  Clip- 

Plaster  Wall 
with 

Trussit 

Wired  to  /Ingle 


Trussit  Solid  Exterior  Walls 

The  use  of  Trussit  as  a  reinforcement  for  solid  exterior  walls  gives  a  con¬ 
struction  in  which  the  reinforcing  is  centrally  located  in  the  wall,  producing 
a  slab  of  uniform  strength  and  homogeneous  throughout. 

Walls  are  quickly  erected  without  forms,  the  cement  plaster  being  applied 
to  the  Trussit  equally  on  both  sides.  Form  marks  are  eliminated  and  a 
pleasing  effect  is  produced  on  each  face  of  the  wall. 

In  framing  around  windows  or  doors  the  Trussit  is  wired  directly  to 
the  angles  forming  the  openings  as  shown  in  accompanying  sketch. 


Cement 
Plaster 


|  \jryssit  Wired  to  fnqle. 

Plaster  Wall 
Reinforced  with 
Trussit 


Cross  Section  of  Trussit 
Reinforced  Exterior  Wall 


fi-ft 


B-B 


Cross  Section  Exterior  Wall 
of  Trussit  on  Wood 
Supports 


Exterior  Trussit  Walls 
on  Wood  Framing 

Particularly  suited  for  high  grade 
residence  construction,  giving,  with 
its  2 -inch  cement  slab,  the  most 
durable  type  of  stucco  work.  Also 
used  for  curtain  walls  and  solid 
partitions  in  every  class  of  building. 

Note — Wherever  Trussit  is  shown, 
Self-Sentering  can  be  used  with  prac¬ 
tically  the  same  detail. 


A  Type  of  Window  Much  Used  with  Solid  Trussit  Walls 


Page  Thirty 


ELF-SENTEKING  X  TEUSSIT 


Trussit  and  Self-Sentering  Fences  and  Railings 


Fences  or  walls,  railings  for  bridges  and  inclined 
runways  can  be  built  with  Trussit  or  Self-Sentering. 
No  form  work  is  necessary  —  the  Self-Sentering  or 
Trussit  is  placed  in  position,  fastened  to  temporary 

supports  and  covered 


?  Coping  Form 

Temporary  Wirinq 
Cof  “Trussit  ” 
to  studding  while 
the  opposite 
^ ^Side is  being 
plastered 


with  cement  plaster.  The 
construction  that  results 
is  thoroughly  reinforced, 
therefore  rigid  and  in 
every  way  equal  in  per¬ 
manence  and  durability 
to  poured  concrete  and 
at  a  great  saving  in  cost. 


The  detail  illustrations  on  this  page  furnish  an 
idea  of  the  method  of  construction.  Further  infor¬ 
mation  will  be  supplied  upon  request. 

Trussit  or  Self-Sentering  Used  for 
Panels  and  Posts 

The  Trussit  or  Self-Sentering  fence,  properly  con¬ 
structed,  never  requires  repairs  or  painting  and  gives 
an  appearance  of  age  and  stability  only  equalled  by 
the  old-time  stone  wall,  the  cost  of  which  is  in  most 
cases  prohibitive. 


Cross  Section  Showing 
Studding  Supports  Base 
and Copmg  Forms  for 
Fence 


-  — \F~? 

- ( 

Key  Lan 

F 

S  9 " 

Longitudinal  Section  B~B 


L  legation 


Wire. 


Cement ^ 
Plaster 

Concreted 


Wire 


Self-Sentering" 
to  extend 
full  length 
of  post 
Section  /l-A 
thru  post 


3' 'Trussit  Wall 


Page  Thirty-one 


The  Complete  Line  of 

GENFIRE  FIRESAFE  BUILDING  PRODUCTS 


includes 

Standard  Steel  Casements 
Pivoted  Steel  Windows 
Projected  Steel  Windows 
Double-Hung  Steel  Windows 
Donovan  Awning  Type  Steel  Windows 
Basement  Windows 
Pressed  Steel  Lintels 
Steel  Doors  and  Frames 
Trussit 
Steel  Tile 

Steel  Mortar  Boxes 
Welded  Steel  Fabric 
T-Bar  Steel  Joists 
Plate  Girder  Steel  Joists 
Corner  Bead 
Self-Sentering 
Expanded  Metal 
Interior  Metal  Trim 
Steel  Road  Forms 
Herringbone  Lath 
Key  Expanded  Lath 
Diamond  Rib  Lath 
Genfire  Sheet  Lath 
Duplex  Steel  Bridging 
Armco  Ingot  Iron  Lath 
Concrete  Reinforcement 
Cold-Rolled  Channels 

Waterproofing  Compounds 

Complete  Literature  and  Data  sent  upon  request  to  nearest  office. 

GENFIRE  STEEL  COMPANY 

YOUNGSTOWN,  OHIO 

BRANCHES 

ALBANY  ATLANTA  BALTIMORE  BOSTON  CHICAGO  CINCINNATI  CLEVELAND 
DALLAS  INDIANAPOLIS  KANSAS  CITY  LOS  ANGELES 

MILWAUKEE  NEW  YORK  MINNEAPOLIS  OMAHA  PHILADELPHIA  PITTSBURGH 
PORTLAND,  OREGON  SAN  FRANCISCO  ST.  LOUIS  SYRACUSE 


Export  Department:  90  West  Street,  New  York  City 


Cable  Address:  “Firegen  New  York" 


